added some type hintings
added some type hintings

Rud5G/zf2-documentation,gennadiylitvinyuk/zf2-documentation,Rud5G/zf2-documentation,samsonasik/zf2-documentation,akrabat/zf2-documentation,gennadiylitvinyuk/zf2-documentation,rettal/zf2-documentation,rettal/zf2-documentation,samsonasik/zf2-documentation,akrabat/zf2-documentation